bridgehead; beachhead; airhead (area of hostile territory that, when captured, serves for the continuous landing (or movement into position) of further troops and material)
Signifying the reversal of order, where the head becomes the tail and the tail becomes the head, such as in a file, battle line, army column. Expression specifically used for horses and cars.
head to foot, top to tail, head-to-tail; with the head of one being placed next to the feet of the other, heads and thraws; (of one object) with a head at both ends